Hydrogen detection using a transmission based optical fibre sensor in the VIS spectrum

Kevin Gleeson, Elfed Lewis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Results are presented for a transmission based optical fibre hydrogen sensor using a thin film layer of Palladium as the sensing element. The thin palladium film was deposited onto a glass substrate via thermal vacuum evaporation. The sensor was tested by exposing the palladium film to 5% Hydrogen gas in a Nitrogen atmosphere. The absorption and desorption of hydrogen causes the optical properties of palladium to change depending on the concentration of hydrogen present in the atmosphere. Using a deuterium/halogen light source in conjunction with a UV/VIS spectrometer the changes in the optical transmittance in the visible spectra of the Pd film was monitored for 5% hydrogen in a nitrogen atmosphere. A comparison of different wavelengths in the VIS spectrum is presented. The response and recovery time for the sensor is shown to be 4-5 seconds and 35 seconds respectively. The sensor is capable of responding to changes of up to 15% and the sensor shows good repeatability to continuous exposure cycles to 5% hydrogen using nitrogen as the carrier and recovery gas.

Original languageEnglish
Title of host publicationEWOFS 2007 Proceedings
Subtitle of host publicationThird European Workshop on Optical Fibre Sensors
DOIs
Publication statusPublished - 2007
EventEWOFS 2007: Third European Workshop on Optical Fibre Sensors - Napoli, Italy
Duration: 4 Jul 20076 Jul 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6619
ISSN (Print)0277-786X

Conference

ConferenceEWOFS 2007: Third European Workshop on Optical Fibre Sensors
Country/TerritoryItaly
CityNapoli
Period4/07/076/07/07

Keywords

  • Hydrogen
  • Palladium
  • Transmission spectroscopy
  • VIS spectrum

Fingerprint

Dive into the research topics of 'Hydrogen detection using a transmission based optical fibre sensor in the VIS spectrum'. Together they form a unique fingerprint.

Cite this